Apparatus for filtering air.



s. COOPER. APPARATUS FOR FILTEIIING AIR.

APPLICATION FILED OCT- 26. I915- LQMJYGQ. Patented Feb. 6, 1917. I 7 I 6 9 ,6 17

fi fl by -1 Attorneys en'rnn sra PATENT @FFTfiE.

SUTTON COOPER, OF EVANSVILLE, INDIANA, ASSIGNOR 0F ONE-HALF T0 FRED OFFERMANN, 0F EVANSVILLE, INDIANA.

APPARATUS FOR- FILTERIN G AIR.

Application filed October 26, 1915.

To allwhom it may concern Be it known that I, SUTTON OooPnR, a citizen of the United States, residing at Evansville, in the county of Vanderburg and State of Indiana, have invented a new and useful Apparatus for Filtering Air, of which the following is a specification.

This invention relates to apparatus for filtering air and is especially designed for use in. the air intake conduits of hot air furnaces and in other places where it is desirable to remove. impurities from supplies of air.

One of the objects of the invention is to provide a novel arrangement of filtering aprons adapted, when in position, to act successively upon the air, means being employed for keeping the aprons saturated with a medium designed to cause dust and other impurities to adhere to the aprons.

A further object is to provide means whereby the apronscan be adjusted to remove those portions thereof which are laden with impurities, from the path of the current of air so that fresh portions of the aprons can be brought to active positions.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood .that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, with-- out departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings: Figure 1 is a side elevation of the apparatus. Fig. 2 is a plan view thereof, portions of the aprons being removed. 3 is an enlarged section on line A--B Fig. 1.

Referring to the figures by characters of reference 1 designates the middle sections of the side rails of a frame, there being end sections 2 pivotally connected to the middle sections at 3 where legs 1 are pivotally mounted. Additional legs 5 are pivotally connected to the outer ends of the sections 2 and extend preferably therefrom, there being cross rods 6 connecting the upper ends of the legs 5 and constituting guides as hereinafter set forth. Secured to the sec- Specification of Letters Patent.

with the arm 14 and lever 15.

' sired number of times.

Patented Feb. 6, 191?.

Serial No. 58,037.

tions 1 are strips 7 extending above and below the sections and provided with longitudinal slots 8 in which rods 9 and 10 are adjustably mounted. J ournaled between the sections 2 at one end of the frame is a drum 10 having a gear 11 rotating therewith, the said gear being normally engaged by a pawl 12 whereby rotation of the drum in one direction is prevented. This gear constantly meshes with a larger or drive gear 13 mounted for rotation at one side of the frame. An arm 14 is mounted to swing about the axis of ear 13 and carries a lever 15 carrying a paw 16. A cord 17 or the like may be connected to lever 15 so that by pulling in one direction thereon the pawl 16 will be forcedinto engagement with a tooth on gear 13 and said gear be caused to rotate However, when cord 17 is released, arm 14 and lever 15 will move downwardly independently of gear 13, pawl 16 slipping over the teeth of said gear.

Mounted for rotation in the end members of the frame at a point remote from the drum 10 are tubular gudgeons 18 extending from heads 18' secured in the ends of a drum 19. This drum has minute perforations in the periphery thereof. One of the gudgeons 18 is constantly closed while the other gudgeon is normally closed by a screw plug 20.

Three aprons 21, 22 and 23 are used in connection with the drums 10 and 19. The apron 21 is secured at one end to the drum 10 and extends therefrom over the rod 6 and thence downwardly to the drum 19, it being extended around said drum 19 any de- A ron 22 is likewise secured to drums 10 and 19 and extends over the upper rod 9 so that it will have portions lying in planes diverging downwardly from the upper rod 9. This apron 22 is likewise normally wrapped about the drum 19 a number of times. The third apron 23 is extended directly from drum 10 to drum 19 and is wrapped a desired number of times about the drum 19, the middle portion of this apron being supported by the lower rod 9. The aprons 21, 22 and 23 are adapted to extend across the air conduit indicated generally at C in Fig. 2 so as to filter all air passing through the conduit. Drum 19 is adapted to be filled with any suitable liquid whereby the apron will be kept moist and apron 23.

the dust caused to adhere thereto. This liquid is supplied to the drum 19 by remov ing the plug 20 and forcing the liquid into the gudgeon 18, after which plug 20 is reinserted. The liquid will escape in minute quantities through the apertures in the drum 19 and be absorbed by those portions of the aprons wrapped about the drum. It will be apparent that air passing into the conduit C will fiow successively through the aprons 21, 22 and 23, it passing through aprons 21 and 23 at right angles thereto and through the apron 22 at an acute angle. Aprons 21 and 22 can be of the same mesh while apron 23 is preferably of a finer mesh. By arranging the apron 22 obliquely as shown, particles of impurities which might pass through the apron 21will be stopped by the apron 22 and should any fine impurities pass through the apron 22 they will be caught up by the After the interstices in the exposed portions of the aprons become clogged, the said aprons can be simultaneously adjusted longitudinally by means of the lever 15 and pawl 16 acting on the gear 13 in the manner hereinbefore described. This will result in the unwinding of the aprons from the drum 19 and the winding of those portions of the aprons containing the impurities. Obviously in order to prevent air from flowing between the filtering apparatus and the walls of the conduit, any suitable arrangement of guards or deflectors may be extended inwardly from the walls of I the conduit and close to the apron, thus to close the spaces which are formed between the frame of the apparatus and the conduit walls. After the aprons have been soiled through long continued use, they can be removed from the ,drums, cleaned, and replaced or new aprons can be provided. As the entire apparatus can be lifted bodily out of the air conduit, this operation of removing and replacing the aprons can be effected readily. It will be understood that by constructing the frame as described, it can be folded readily to occupy a small space.

What is claimed is:

1. In air filtering apparatus, a liquid containing drum having peripheral apertures, a take-up drum, separate aprons resting one upon the other and each having its ends wrapped about the espective drums, said' aprons being extended across the space between the drums and being spaced apart in said space, and means for actuating the drums to shift the aprons in the direction of their length.

' 2. The combination with an air conduit, of air filtering apparatus within and extending across the conduit, said apparatus including spaced drums having peripheral apertures, one of said drums constituting liquid supplying means, aprons arranged one against the other and each secured at its ends to the respective drums, said ends being wound upon the drums, said aprons extending across the space between the drums and being spaced apart in said space, and means for rotating the drums to shift the aprons simultaneously in the direction of their length, said aprons being adapted to receive moisture from the apertured drum.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two-witnesses.

, SUTTON COOPER. Witnesses:

JAcoB SoHLUEoER, HERMAN HOLTMAN. 

